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Circulant block-factorization preconditioners for elliptic problems

โœ Scribed by I. D. Lirkov; S. D. Margenov; P. S. Vassilevski


Publisher
Springer Vienna
Year
1994
Tongue
English
Weight
726 KB
Volume
53
Category
Article
ISSN
0010-485X

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On block-circulant preconditioners for h
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## a b s t r a c t We study some properties of block-circulant preconditioners for high-order compact approximations of convection-diffusion problems. For two-dimensional problems, the approximation gives rise to a nine-point discretisation matrix and in three dimensions, we obtain a nineteen-poin